Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

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Stockholders' Equity (Details Textual) (USD $)
6 Months Ended
Jun. 30, 2012
Apr. 09, 2012
Mar. 15, 2011
Sep. 30, 2010
Dec. 31, 2009
Stockholders' Equity (Textual) [Abstract]          
Purchase and sale of shares of common stock under subscription agreements   6,517,648      
Exercise price of warrant per share     1.57 0.87 2.13
Payments of Stock Issuance Costs $ 500,000        
Fair Value Of Warrants 2,900,000        
Series A Warrants [Member]
         
Stockholders' Equity (Textual) [Abstract]          
Purchase and sale of warrants of common stock under subscription agreements   6,517,648      
Exercise price of warrant per share   1.15      
Series B Warrants [Member]
         
Stockholders' Equity (Textual) [Abstract]          
Purchase and sale of warrants of common stock under subscription agreements   6,517,648      
Exercise price of warrant per share   0.85      
Deerfield Warrant [Member]
         
Stockholders' Equity (Textual) [Abstract]          
Exercise price of warrant per share   1.25      
Institutional Investor [Member]
         
Stockholders' Equity (Textual) [Abstract]          
Gross proceeds from sale to institutional investor $ 5,540,000